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UCC28221 Status: ACTIVE

Dual Interleaved PWM Controller with Programmable Max Duty Cycle


      
         
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Datasheet

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 UCC28221
TopologyFlyback, Forward  
Control MethodCurrent Mode  
Duty Cycle(Max)(%)90  
PWM Outputs(#)2  
Frequency(Max)(kHz)2000  
UVLO Thresholds On/Off(V)13.0/8.0  
Pin/Package16SOIC, 20TSSOP  
Regulated Outputs(#)2  
 Samples
 Inventory

Customers Who Evaluated This Product Also Evaluated

  • UCC28220: Dual Interleaved PWM Controller with Programmable Max Duty Cycle
  • UCC3895: BiCMOS Advanced Phase Shift PWM Controller
  • UC28025: Economy High Speed PWM Controller
  • TL431: Adjustable Precision Shunt Regulator
  • TPS61170: 1.2A Switch, High Voltage Boost Converter in 2x2mm QFN Package
  • TPS54331: 3A, 28V Input, 570 kHz Step Down SWIFT™ DC/DC Converter with Eco-mode ™

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Product Information

Features

  • 2-MHz High Frequency Oscillator with 1-MHz Operation Per Channel
  • Matched Internal Slope Compensation Circuits
  • Programmable Maximum Duty Cycle Clamp 60% to 90% Per Channel
  • Peak Current Mode Control with Cycle-by-Cycle Current Limit
  • Current Sense Discharge Transistor for Improved Noise Immunity
  • Accurate Line Under and Over-Voltage Sense with Programmable Hysteresis
  • Opto-Coupler Interface
  • 110-V Internal Start-Up JFET (UCC28221)
  • Operates from 12-V Supply (UCC28220)
  • Programmable Soft-Start
  • APPLICATIONS
    • High Output Current (50-A to 100-A) Converters
    • Maximum Power Density Designs
    • High Efficiency 48-V Input with Low Output Ripple Converters
    • High Power Offline, Telecom and Datacom Power Supplies

Description

The UCC28220 and UCC28221 are a family of BiCMOS interleaved dual channel PWM controllers. Peak current mode control is used to ensure current sharing between the two channels. A precise maximum duty cycle clamp can be set to any value between 60% and 90% duty cycle per channel.

UCC28220 has an UVLO turn-on threshold of 10 V for use in 12-V supplies while UCC28221 has a turn-on threshold of 13 V for systems needing wider UVLO hysteresis. Both have 8-V turn-off thresholds.

Additional features include a programmable internal slope compensation with a special circuit which is used to ensure exactly the same slope is added to each channel and a high voltage 110-V internal JFET for easier startup for the wider hysteresis UCC28221 version.

View All Description in Datasheet

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
UCC28221DACTIVE-40 to 1052.15 | 1kuSOIC (D) | 16 View 40 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UCC28221DG4ACTIVE-40 to 1052.15 | 1kuSOIC (D) | 16 View 40 | TUBE  
UCC28221DRACTIVE-40 to 1052.15 | 1kuSOIC (D) | 16 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
UCC28221DRG4ACTIVE-40 to 1052.15 | 1kuSOIC (D) | 16 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
UCC28221PWACTIVE-40 to 1052.15 | 1kuTSSOP (PW) | 20 View 70 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UCC28221PWG4ACTIVE-40 to 1052.15 | 1kuTSSOP (PW) | 20 View 70 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UCC28221PWRACTIVE-40 to 1052.15 | 1kuTSSOP (PW) | 20 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
UCC28221PWRG4ACTIVE-40 to 1052.15 | 1kuTSSOP (PW) | 20 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples

* Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.

Inventory

Reported Distributor Inventory as of 9:51 AM GMT, 25 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 20 WeeksUCC28221D
AmericasAvnet 28
Rochester Electronics >1k
AsiaFarnell Asia 100
WPI 50
EuropeFarnell 50
Spoerle 120
WorldwideDigiKey 104
Mouser Electronics 135
TI Lead Time*: 20 WeeksUCC28221DG4
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksUCC28221DR
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksUCC28221DRG4
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksUCC28221PW
AmericasRochester Electronics >1k
AsiaWPI 85
WorldwideDigiKey 106
Mouser Electronics 120
TI Lead Time*: 20 WeeksUCC28221PWG4
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksUCC28221PWR
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksUCC28221PWRG4
WorldwideDigiKey  Available
View all Distributors  

** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information.

Quality & Lead (Pb)-Free Data

 Product ContentDPPM / MTBF / FIT Rate
DeviceEco Plan* Lead / Ball FinishMSL Rating / Peak ReflowDetailsDetails
UCC28221D RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
UCC28221DG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
UCC28221DR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
UCC28221DRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
UCC28221PW RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
UCC28221PWG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
UCC28221PWR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
UCC28221PWRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView

* The planned eco-friendly classification: Pb-Free (RoHS) or Pb-Free (RoHS Exempt) or Green (RoHS & no Sb/Br) - please click on the Product Content Details "View" link in the table above for the latest availability information and additional product content details.

If the information you are requesting is not available online at this time, contact one of our Product Information Centers regarding the availability of this information.

Technical Documents

Most useful technical documents for UCC28221 Help

Datasheet

Application Notes

View Application Notes for PWM Power Supply Controllers

Tools & Software

NamePart # Company Tool / Software Type
UCC28221 MathCAD Calculation UtilityUCC28221-CALCTexas InstrumentsCalculation Utilities
UCC28221 200-W Evaluation ModuleUCC28221EVMTexas InstrumentsDevelopment Boards/EVMs
UCC28528 Evaluation ModuleUCC28528EVMTexas InstrumentsDevelopment Boards/EVMs

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